I have two machines connected through a switch

one with a multihomed debian lenny machine
eth1 dhcp to cable modem
eth0 ip no 192.168.0.2 nm 255.255.255.0

another
windows xp machine
eth0 192.168.0.3

I can ping from the windows machine successfully. But when I tries to do the same from the linux machine, it waits for a long time.

When I issue the arp command

Address HWtype HWaddress Flags Mask Iface116.68.80.1 ether 00:1B5:FF:69:05 C eth1
192.168.0.3 ether 00:1C:C0E2:14 C

sun:/home/sunil# route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.0.0 192.168.0.2 255.255.255.0 UG 0 0 0 eth0
192.168.0.0 * 255.255.255.0 U 0 0 0 eth0
116.68.80.0 * 255.255.240.0 U 0 0 0 eth1
default 116.68.80.1 0.0.0.0 UG 0 0

sun:/home/sunil# tcpdump
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth0, link-type EN10MB (Ethernet), capture size 96 bytes
09:38:19.814396 IP 192.168.0.2 > 192.168.0.3: ICMP echo request, id 22550, seq 1, length 64
09:38:20.824139 IP 192.168.0.2 > 192.168.0.3: ICMP echo request, id 22550, seq 2, length 64
09:38:21.824188 IP 192.168.0.2 > 192.168.0.3: ICMP echo request, id 22550, seq 3, length 64
09:38:22.824230 IP 192.168.0.2 > 192.168.0.3: ICMP echo request, id 22550, seq 4, length 64
09:38:23.824266 IP 192.168.0.2 > 192.168.0.3: ICMP echo request, id 22550, seq 5, length 64
09:38:24.812289 arp who-has 192.168.0.3 tell 192.168.0.2
09:38:24.812363 arp reply 192.168.0.3 is-at 00:1c:c0:de:d2:14 (oui Unknown)
09:38:24.824309 IP 192.168.0.2 > 192.168.0.3: ICMP echo request, id 22550, seq 6, length 64

8 packets captured
8 packets received by filter
0 packets dropped by kernel

netsh firewall set icmpsetting 8 enable

run this on the windows machine and maybe its a simple firewall issue.

Yes it was the problem with the windows fire wall
No it is ok

One more----


What does the command means?

It's the short way instead of clicking 6+ times or e.g.:

1. Open Windows Firewall by going to Control Panel or the properties of the connection.
2. Select Advanced (Figure Windows Firewall Advanced)
3. Click Setting in the ICMP.
4. Check the Allow incoming echo request (Figure ICMP Settings).